I have an iMac with OS 10.6.8. What is the correct operating system to get all of Creative Cloud working?

I believe that 10.6.8 does not meet the system requirments for most applications.  Here are links to a few popular applications where you can compare the system requirements versus your system.

Premiere Pro - http://helpx.adobe.com/premiere-pro/system-requirements.html

After Effects - http://helpx.adobe.com/after-effects/system-requirements.html

Photoshop - http://helpx.adobe.com/photoshop/system-requirements.html